Procedures in programming

Computing

Programming a screen turtle

Create an algorithm for a text-based program

Patterns and repeats

Count-controlled loops

Creating a program that uses loops

In this unit pupils will create text-based programs which use repetition. They will plan, modify, and test commands to create shapes and patterns. They will explore the different types of loops that can be used to repeat commands in a program.

Repetition in programs

Write an algorithm for the smaller steps.

Put these steps of decomposition in order.

a named set of commands that can be reused

Order these steps for using a procedure in a program.

The name is only for humans, the computer only follows the instructions.

The name must match the algorithm exactly.

The computer understands the name and acts accordingly.

What of these statements about a procedure is correct?

Write the command to create a new procedure called square.

a set of ordered commands that a computer can run

a precise sequence of steps to complete a task

a small shape that moves and draws on the screen

What does the term "debug" mean in programming?

a section of code that runs a certain number of times

What command would you use to draw a square with a screen turtle? Use the repeat command and sides of 100 steps.

Procedures in programming

Lesson outcome